= residuals.e =

Residuals tests the landmarks to look for problems.  It will give you a report based on landmarks, pictures and maps.

=== Input - files ===
 * [[LMKFILES]]
 * [[IMAGEFILES]]
 * [[PICTLIST.TXT]]
 * [[LMRKLIST.TXT]]

=== Input - stdin ===

 enter plim (px,km,km)

 * The number of pixels an images needs to be "off" to throw the chevron (>>) flag
 * The rms error of a landmark 
 * Sets the "bin" size for the final histogram (basically how many images are in which side categories).   

 input operation list
{{{ 
     2.5, 1, 001
}}}


=== Output ===
 * [[MAPINFO.TXT]]
 * [[PICINFO.TXT]]
 * [[LIMINFO.TXT]]
 * [[RESIDUALS.TXT]]

=== Description ===
 * Compares predicted and observed pixel, line position of the landmarks in the images
 * Produces RSS of the diagonal convariance elements of each control point
  * Describes landmark position uncertainty
 * Flags landmarks with residuals over specified pixel value

=== Control Points ===

 * Inputs are wweights for S/C uncertainties from measurement uncertainties and from a-prior shape constraints
 * Control points solution results in a 3x3 output covariance for each control point. Diagonal elements are uncertainties along maplet coord. system axes, i.e. two horizontal directions & height. Typically SPC produces comparable horizontal & height uncertainties. Results are summarized as a scalar standard deviation per degree of freedom in meters
 * Residuals check automatically flags errors beyond certain input values in dump file for ease of inspection  
{{attachment:residuals_controlpoint1.jpg}}

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CategoryPrograms